4. When the cookies come out of the oven, push 3 chips into each warm cookie, point side down. Leave room between chips to pipe chocolate spider legs. Allow cookies to cool completely.

5. Melt remaining chocolate chips in microwave, in 15-second intervals, stirring after each interval. Place piping bag upright into an empty drinking glass. Carefully pour melted chocolate into the piping bag. Allow to sit for a few minutes so it is not too hot to handle. Cut small tip off of the piping bag. Twist the top of bag closed; pipe spider legs on both sides of each chocolate chip on top of cookies.
Allow the chocolate to cool completely before serving or storing.